40 Under 40

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Welcome to Fortune’s 2018 40 Under 40, our annual ranking of the most influential young people in business. Read on to meet these disruptors, innovators, rebels and artists—and prepare to be inspired.
Click here to read The Ledger 40 Under 40 list.

Logan Green and John Zimmer, 34, 34

Cofounder and CEO; Cofounder and president, Lyft

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Winni Wintermeyer

Zimmer was warned he wasleaving a “sure thing” when he quit Lehman Brothers to help Green with a carpooling website called Zimride. Months later, Lehman collapsed, but Zimride morphed into Lyft, making the duo two of the most successful entrepreneurs of the past decade. This year, the No. 2 ride-hailing service behind Uber has surged, benefiting from its arch rival’s troubles: Over the past year, Lyft’s valuation has doubled to $15 billion, and its U.S. market share jumped from 20% to 35%. Next up? Bike-sharing.